Linear Actuators for Power Sofas and Lift Chairs: Matching the Actuator to Each Movement

An electric sofa has up to three powered movements: the footrest swings out, the back reclines, and on a lift chair the whole seat rises and tilts to help the user stand. Each movement wants a different stroke and a different amount of force, but they all share one requirement an industrial actuator cannot meet — the drive has to disappear inside the furniture. This guide shows which actuator in the Zhiheng furniture range fits each sofa movement, and which control box runs a single seat or a whole three-seater.

Start with the shape, not the force

Sofa mechanisms are built around compact furniture actuators with the motor mounted alongside the tube, not in line with it. The HH-LA-U4 is that shape: a side-mounted motor keeps the unit short and flat enough to sit inside a sofa base, the inner tube is stainless steel, and it still delivers 6,000 N of push (4,000 N pull) at 2.7 mm/s under load on 24V DC. That slow, loaded speed is a feature in furniture — a footrest should glide, not kick.

The HH-LA-U9 and HH-LA-U10 are the heavier bed-and-furniture platform: the same 6,000 N at a slightly faster 4 mm/s loaded, also 24V, with strokes from 100 to 400 mm. On sofas they suit the lift-chair base, where the actuator works against the user's full weight, and wide multi-seat mechanisms driven by a single central unit.

Movement by movement

Footrest. The lightest job on the sofa. Travel is short, the load is legs and a padded panel, and smoothness matters more than force. A U4 in a 100–200 mm stroke is the usual pick; its built-in limit switches stop the mechanism cleanly at both ends without external sensors.

Reclining back. The back actuator works against springs, upholstery tension and the sitter's weight shifting backwards. Mid-range strokes (150–300 mm) cover most recline angles; again the U4's flat profile fits the shallow space behind a seat back.

Lift and tilt (lift chairs). This is the heavy lift: seat, mechanism and user rise together. Use the U9/U10 platform here, sized by stroke to the lift height of the base. If the chair is for an elderly user at home, consider what happens in a power cut — the manual-release version, HH-LA-U9-2, can be wound down by hand so the user is never stranded mid-lift.

When the mechanism slides: track actuators

Not every sofa mechanism swings on a pivot. Sofa beds pull out, some footrests slide forward before they tilt, and many recliner linkages are designed around a straight, guided run. That is the job of a track (rail) actuator: the motor drives a carriage along a fixed rail, so the moving part cannot wander sideways and the whole drive stays flat inside the frame.

• The HH-LA-TP41 and HH-LA-TP61 bring the full 6,000 N push (4,000 N pull) at 5 mm/s under load — enough for complete recliner and sofa-bed mechanisms on one rail. Stocked strokes run 100–450 mm, and the factory range extends to 1,000 mm as a custom order, which covers pull-out sofa-bed travel no tube actuator reaches cleanly.
• The HH-LA-TP21 is the light version: 2,000 N at 4 mm/s for footrest slides, panels and lighter furniture mechanisms.

All three run on 12V or 24V DC and are sealed to IP43 for indoor furniture duty. Note the control difference: the track actuators take standard 12V/24V control gear (controllers sold separately) — they do not run on the 29V furniture control boxes below, which belong to the 29V furniture system (HH-LA-U9, U10, U4 and U9-2). If your mechanism already has a 12V or 24V supply, the TP rail usually drops straight in; ask us to confirm the match before ordering.

One control box per sofa, not per actuator

Furniture actuators in this range run as a system: one control box drives every actuator in the seat, and one handset controls them all.

• Single seat (footrest + back, up to 2 actuators): the HH-CB-M02 — 110–240V AC input, 29V DC output, built-in overload protection.
• Multi-seat sofas and lift chairs (up to 4 actuators): the HH-CB-M03, same wide input range, four actuator ports.
• Handset: the HH-HC-H05 covers up to five actuators with up to 10 keys, an optional backlight and a hanging hook that keeps it on the armrest where it belongs.

Note that this 29V furniture control system is separate from our 12V/24V actuator kits: the U9, U10, U4 and U9-2 actuators pair with the M02/M03 boxes, not with the wired or wireless kits sold for the 12V/24V U-series. If you are retrofitting an existing sofa, tell us what control box is already in it before ordering actuators.

Fitting notes that save a return

• Retracted length decides fit. A sofa base gives you a fixed closed length; pick the stroke after measuring the space, using the dimension drawing on the product page — not the other way round.
• Duty cycle is 10%. Furniture actuators are rated for short positioning bursts (max 2 minutes continuous), which matches sofa use exactly: a few seconds of movement, then rest.
• IP54 is enough indoors. The sealed housing keeps dust and upholstery fibres out of the drive; these are indoor furniture components, not outdoor actuators.
• Force is rarely the limit. At 6,000 N (about 612 kg of push) a single actuator out-lifts any sofa mechanism; if a mechanism feels weak, the problem is almost always leverage and mounting position, not the actuator.

Every actuator mentioned here carries a 12-month warranty. Building a power sofa or lift chair and want the mapping checked? Email your mechanism layout — movements, seat count and available closed length — to support@hyhavenstore.com and we will match actuators and a control box to it.

FAQ

How many actuators does a three-seat power sofa need? Typically one control box (HH-CB-M03) and one or two actuators per seat, depending on whether each seat has its own footrest and recline. The M03 drives up to four actuators; larger configurations are a custom order — ask us.

Can one handset run the whole sofa? Yes. The HH-HC-H05 controls every actuator connected to the control box, with up to 10 keys for the different movements and seats.

U4 or U9 — which is better for a recliner? For the footrest and back inside a standard recliner frame, the U4's side-mounted motor fits where an in-line actuator cannot. For the lift base of a lift chair, the U9 platform is the stronger match.

Can a track actuator (TP series) replace a tube actuator in my sofa? If the mechanism is built around a rail — sliding footrests, sofa-bed pull-outs, guided linkages — yes: the carriage runs straight over long travel and the rail keeps it aligned. If the mechanism simply pivots between two mounting eyes, a tube-type U4 or U9 is the natural fit. Send us a photo of the mechanism and we will tell you which family it belongs to.

What if the power fails with the chair lifted? The actuator stops in place. The manual-release HH-LA-U9-2 can be cranked down by hand, which is why we recommend it for lift chairs used by elderly people living alone.